I setup a freeswitch pbx on makersalliance.com and connected it to a free incoming Washington state number: 206-424-9017

At the moment it's set up to say a few snarky things and hang up. It can also function as a softphone switching station. If you
install a softphone you can
connect as any extension between 1001-1019 with password 1234, and than
call other extensions. My softphone is currently extension 1000, but I'm
about to go out for an hour or so. Here are some additional extensions: